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In one survey, the shoe sizes of women are distributed normally about the mean. The mean of the data is 7.17, and the standard deviation is 1.44. About what percent of the women are within two standard deviations of the mean in shoe size?

Answer :

The solution to the problem is as follows:

Mean +/- 2 SD covers 95% of the values

Therefore, the standard deviation of the mean in shoe sizes is 95%.

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